Convert BTU, kWh, therms, and fuel heating values (HHV/LHV)
Learn energy unit conversions, power calculations, and fuel consumption rates
One MCF (thousand cubic feet) of natural gas equals approximately 1.02 MMBtu, based on a standard heating value of 1,020 BTU/scf. The exact conversion depends on the gas composition and whether higher heating value (HHV) or lower heating value (LHV) is used.
Higher Heating Value (HHV) includes the latent heat of water vapor formed during combustion, while Lower Heating Value (LHV) excludes it. HHV is standard for gas purchasing and combustion equipment sizing in the US per EIA and GPSA conventions.
One therm equals exactly 100,000 BTU. Therms are commonly used for residential gas billing in the United States, while commercial and industrial transactions typically use MCF or MMBtu.
Standard conditions for gas energy calculations are 60°F and 14.73 psia per GPSA and AGA conventions in the United States. These base conditions are used for custody transfer metering and heating value determination.